{{explanation}}
A new 1st couple starts from 1pl every 16 bars. Couples are referred to by their place

1–
: 1plC+2plC+3plC mirror Reels3 on the sides, 2plC starting out and up (1,2,3,4)
9–
: 1plC cross RH | cast off (2plC up) ; cross LH | cast off (3plC up) (2,3,1,4)
17–
: 1plC+2plC+3plC mirror Reels3 on the sides, as in [1–8].
25–
: 1plC cross RH | cast off (2pl C up) ; cross LH | cast off (3pl C up) **while{8}** 3plC facing 4plC set | change places on the sides, the M LH and the W RH ; both couples set to P | the new 4plC sets as the new 3plC steps up.

{{explanation}}
Repeat [17–32] three times, but the third time, the original 1c, arriving in 1pl after the reels [65–72] stands still for the last 8 bars [73–80].